The singer, who was recently diagnosed with cancer, thrilled attendees when he chose to perform a surprise in the lobby of the hospital tower. At the request of the audience, he finally agreed to sing the classic "No Way Out" and replaced the lyrics with a prayer for "There is a way out" Last week, the singer revealed that he has been diagnosed withcancer and will soon begin a series of radiation and chemotherapy treatments.

"I'm still having trouble digesting. I was defined as an oncology patient, there is no need for it to leak," he wrote.